نتایج جستجو برای: diamond alpha integral
تعداد نتایج: 335683 فیلتر نتایج به سال:
Using DC-Plasma Enhanced Chemical Vapour Deposition (PECVD) system, the impact of pure Co onthe growth of diamond-like carbon (DLC) nano-structures were investigated. In this study, Acetylene(C2H2) was diluted in H2 and used as the reaction gas and Cobalt (Co) nano-particles were used asthe catalyst. The effect of preparing Co catalyst at temperatures of 240°C and 350°C and growthconditions was...
This study, investigates the effect of bias voltage on structural changes of diamond-like carbon thin film created by ion beam deposition is investigated. For this purpose, the bias voltage in the values of 0 V, -50 V, -100 V and -150 V on the AA5083 aluminum alloy was considered. Raman spectroscopy was used to evaluate structural. Influence of the bias voltage on the thickness and roughness of...
At ambient pressure tin transforms from its ground state, the semimetal $\ensuremath{\alpha}$-Sn (diamond structure), to metallic $\ensuremath{\beta}$-Sn at $13{\phantom{\rule{0.16em}{0ex}}}^{\ensuremath{\circ}}\mathrm{C}$ (286 K). There may be a further transition simple hexagonal phase, $\ensuremath{\gamma}$-Sn, above 450 K. These relatively low temperatures are due small energy differences b...
We demonstrate a new approach for engineering group IV semiconductor-based quantum photonic structures containing negatively charged silicon-vacancy (SiV(-)) color centers in diamond as quantum emitters. Hybrid diamond-SiC structures are realized by combining the growth of nano- and microdiamonds on silicon carbide (3C or 4H polytype) substrates, with the subsequent use of these diamond crystal...
ابتدا روشی برای محاسبه ی گروه گالوایی چندجمله ایهای درجه ی سوم و چهارم تحویل ناپذیر و تفکیک پذیر ، در میدان هایی که مشخصه ی آن ها $2$ نباشند ، ارائه می دهیم. سپس نشان می دهیم که تعداد نامتناهی میدان درجه ی $4$ با یک پایه ی صحیح توانی وجود دارد. همین طور اگر $p$ یک عدد اول فرد و $q=p^{m}$ و $zeta$ ، $ - q $ امین ریشه ی واحد و $o_{q}$ حلقه ی اعداد صحیح در میدان...
This work studies the spectral problem of a class fractional elliptic operators$ \begin{cases} -\alpha D{I_{a+}^{{1-\mu}}}Du-\beta D{I_{b-}^{{1-\mu}}}Du = \lambda u, x \in (a, b)\\ u(a) u(b) 0, \\ 0<\mu<1, 0<\alpha, \beta<1, \alpha+\beta 1. \end{cases} $With regularity results, we mainly prove that each eigenvalue $ \mathbb{C} must have |{\text{Arg}} \lambda|\leq \arctan( |\alpha-\b...
We report results from a systematic study of breakdown limits for various high rate gaseous detectors: PPAC’s, MGC’s, diamond-coated MSGC’s, MICROMEGAS, CAT. It was found that for all these detectors, the maximum achievable gain, before breakdown appears, drops dramatically with incident flux, and is sometimes inversely proportional to it. Further, in the presence of alpha particles, typical of...
The optimization of biosensing efficiency on a diamond platform depends on the successful coupling of biomolecules on the surface, and also on effective signal transduction in the biorecognition events. In terms of biofunctionalization of diamond surfaces, surface electrochemical studies of diamond modified with undecylenic acid (UA), with and without headgroup protection, were performed. The d...
A metal-based matrix is usually used for the fabrication of diamond bits in order to achieve favorable properties and easy processing. In the effort to reduce the cost and to attain the desired bit properties, researchers have brought more attention to diamond composites. In this paper, Fe-based impregnated diamond composites for drill bits were fabricated by using a pressureless infiltration s...
High aspect ratio diamond nanocone arrays are formed on freestanding diamond film by means of focused ion beam (FIB) milling technology and hot-filament chemical vapor deposition (HFCVD) method. The structure and phase purity of an individual diamond nanocone are characterized by scanning electron microscopy (SEM) and micro-Raman spectroscopy. The result indicates that the diamond cones with hi...
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